Electromagnetic and vacuum debris collector



sept. 29, 1964 l3,150,404

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czewcf 77 dof/50M United States Patent O "lee $56,404 ELEVTRlviAGNETICAND VACUUM DEBRIS CLLECIGR Ciarence T. Johnson, iai, Calif., assigner toMAKE. Development Company, Inc., Sunnyvale, Calif. Filed Ang. 3l, i952,Ser. No. 2,245,544 2 Cinims. (Ci. 15-33) This invention relates, ingeneral, to a machine or device for removing debris of magnetic ornon-magnetic materids from floors, roads, streets or other similarsurfaces and, more specifically, the instant invention pertains to amobile unit for eecting the debris collection.

One of the primary objects of this invention is to provide combinedelectromagnetic and vacuum means which may be operated independently ofone another or in combination with one another to collect metallic andnon-metallic debis and/or refuse from streets, roads, or other similarsurfaces, the collector means being adaptable for a one-man operation.

Another object of this invention is to provide electromagnetic andvacuum debris collecting means of the type generally deiined supra,together with means for moving the debris collector means about avertical axis, and means for vertically adjusting the collector meansrelative to the surface being cleaned, and further means for adjustingthe debris collector means in radial directions with respect to saidvertical axis.

Still another object of this invention is to provide a debris collectingdevice of the type generally referred to above, the controls for thedevice being non-complex and within easy reach of the operator, and toprovide portable means to eect transfer of the device from one site toanother.

This invention contemplates, as a further object thereof, tl e provisionof an electromagnetic and vacuum debris collector machine or devicewhich is non-complex in construction and assembly, inexpensive tomanufacture and maintain, and which is durable in use.

Other and further objects and advantages of the instant invention willbecome more evident from a consideration of the following speciiicationwhen read in the iight of the accompanying drawings, in which:

FIGURE l -is a side elevational View of an electromagnetic and vacuumdebris collecting mechanism or device constructed in accordance withthis invention, and illustrating the same as being mounted on the bed ofa conventional truck or other automotive means;

FIGURE 2 is a top plan view of the electromagnetic and vacuum debriscollecting device shown in FIGURE 1, and ihustrating in broken lines theswinging movements of the several booms;

FIGURE 3 is an enlarged longitudinal cross-sectional view illustratingdetails of the collector bin construction and the means for supportingthe inner ends of the booms and for etecting arcuate movement thereofabout a vertical axis;

FIGURE 4 is a fragmentary detail cross-sectional view, FIGURE 4 be'mgtaken substantially on the vertical plane of line 4-4 of FIGURE 3,looking in the direction of the arrows, FIGURE 4 illustrating furtherdetails of the collecting bin construction and showing in side elevationthe means for pivoting the booms about their vertical axes;

FIGURE 5 is an end elevational view of the electromagietic and vacuumdebris collector showing the boom as having been swung through ahorizontal arc of approximately 180 degrees, FIGURE 5 showing in fulllines a working position of the collector device and in broken lines, asecond working position of the device;

FIGURE 6 is a side elevational view of the electro- 3,l5il,404 PatentedSept. 29, 1964 magnetic means and vacuum nozzle utilized in this machineand showing the association therebetween;

FIGURE 7 is an end elevational view of the electromagnetic and vacuummeans shown in FIGURE 6;

FIGURE 8 is a bottom plan View of the electromagnetic and vacuum meansshown in FIGURE 6;

FIGURE 9 is an enlarged detail cross-sectional view, FIGURE 9 beingtaken substantially on the vertical plane of line 9 9 of FIGURE 6,looking in the direction of the arrows; and

FIGURE l0 illustrates, in perspective, a modified form of theelectromagnetic pick-up means according to this invention.

Reference numeral 10 designates, in general, a conventional truck orother similar automotive transportation means. The truck lll is providedwith the usual front and rear wheels (see FIGURES l and 5), the wheelsl2, 14 having supported thereon the usual chassis 16. The forward end ofthe truck 1t) is provided with the customary cab I8 supported on thechassis 16, and also supported on the chassis I6 is an elongated,substantially rectangular truck bed Zii. Reference numerals 22, 24denote the conventional longitudinally-extending, laterally-spaced andsubstantially parallel side walls, and reference numeral 2:5 designatesa front end wall which extends across the forward ends of the side walls22, 24. Reference numeral 28 designates, in general, a debris or refusecollector bin having an elongated, substantially hollow rectangularconstruction and which includes a pair or' elongated, substantiallyrectangular side walls 3i), 32 laterally spaced from one another andextending in parallel relationship relative to each other, front andrear end walls 34, 35 each having a rectangular configuration andextending across and being connected to adjacent pairs of ends of theside walls 3G, 32, and substantially rectangular top and bottom walls38, 49, respectively, complete the hollow cubical receptacle. Thecollector bin 23 is anchored to the truck bed 26 by means of anglemembers 42 having leg portions 44 welded or otherwise secured to thelower ends of the side Walls 3d, 32 and the front wall 34. The footportions 46 of the angle members 42 are fixedly connected to the bodZtl, as by bolts 48 or other conventional means.

The end Wall 36 is formed with a central substantially rectangularclean-out access opening 59 closed by a pair of doors 52, 54 (seeFIGURES 3 and 5) hingedly connected at 56 to the end wall 36 adjacentthe marginal vertical edges ot the opening 5t). Any conventional meansmay be employed to releasably secure the free vertical edges of thedoors 52, 54 in closed confronting relationship.

Reference numeral o?. indicates an electric motor having a casing ilange64 (see FIGURE 3) and provided with a drive shaft 6o. that passestransversely through the motor mounting plate e3 extending across anopening 79 formed in the front end wall 34 and into the collector bin2S. The drive shaft o6 connects with the hub 'i2 of a vacuum or exhaustpump 74 having a plurality of ir. peilcr blades 'i5 secured to the hub7?. for rotation therewith. As is seen in the drawings, the blades 76have their respective opposed ends iixedly secured to a pair oflaterally-spaced cylindrical side plates Si), the latter being integralwith or iixedly secured to the hub 7 2. The cylindrical side plate 78 iscentrally apertured as at e2 to permit the passage of air therethrough.The vacuum pump 74 inciudes a substantially hollow cylindrical housing33 having opposed substantially circular parallel side walls 34, heldlaterally-spaced relation by a peripheraliy connected cylindrical endwall d3. The housing S3 encase the impeller blades and their associatedside plates s 73, Si), and has aV throated opening 9i? formed in theside wall S4 registering with the aperture S2 and being coamaltherewith.

As is seen in FlGUltE 3, the ange 64, mounting plate 68, front Wall 34,and the side wall 26 are iixedly connected together by bolts 92. y VVFor reasons to become apparent below, the top wall 37S is reinforced bycross brace members 94 having an inverted, substantially Uj-shapedconfiguration. o

Y An elongated air inletconduit 96 extends through the rear wall 36adjacent the upper end thereof and has an externally-projecting portion96A and a portion 95B that extends'into the collector bin 2S.V The innerend of the conduit is beveled at 96C to form a downwardly-opening debrisand refuse discharge spout. The outer terminal end of theV sprout 96 maybe welded or otherwise secured to'one of the cross braces 94 as is theupper end of a substantiallyY rectangular screen p, the latter beingdownwardly-inclined at an acute angle relative to the plane of the frontend wall 34. The lower end of the screen 98 terminates in an arcuate liplbllrwhich seats on a lower portion of the throat 90,

' V Referring more speciiically to FIGURE 3, reference nu# eral 192designates a vertically-elongated, substantially hollow cylindricalmember having an upper end closure wall 104 and an opposed open endintegral with an out wardly-extending circumferential flange 106 weldedat 1&8 or otherwise secured to the top wall 38. YAs seen in thedrawings, the vertical axis of the cylindrical member 102 is centrallylocated between the side walls 30, 32 and forwardly of the top Wall 3S.A hollow cylindrical sleeve Y 11! embracesr the cylindricalrmernber 1132in concentrically-spaced relation relative thereto and is so held byinterposed top and bottom bearings 112, 114, respectively. Secured tothe lower end of the sleeve 119 is a collar 116V having anoutwardly-extending .radial ilange 11S superimposed over the flange 166and held in rotatable elevated position relative thereto by means ofinterposed bearings 120. The collar` 116 Vis xedly secured to the sleeve110 by any conventional means.

The upper end of the sleeve 11i) is closed by a horizontal platform 122that projects laterally therebeyond to form a support for an operatorsseat 124 of any desired construction;

Also supported on the top wall 38 is a substantially U-shaped bracket126 (see FIGURES 3 and 4), the bracket 125having opstanding side walls12S, 134) which support a bin 132 on which is mounted atongue 134 thatprojects radially and downwardly from a hydraulic cylinder 136 havingan'extendable' and contractable piston rod 138. The outer end of thepiston rod 133 is provided withconventional coupler means 14% forconnection with a link of an endless chain 142. Y about a pair of'idlersprockets 144, 146 supported on standards 148, 151B, respectively, Xedlysecured, by con# ventional means notl shown, to the top wall 3S onYopposite sides of the sheet/e119', and the chain 142 also erf;-V tendsaround and meshes with the sprocket 152 flxedly to the sleeve 11i)adjacent the lower end thereof.V Actua-V tion of the hydraulic cylinder136 to elfect extension and retraction'of the piston rod 138 will edectrotation of the sleeve in a clockwise orV counterclockwise direction asviewed in FlGURE 2. Y

A motor-generator unit 152 (see FIGURES 2V and 3) is lixedly securedtothe top wall 38 Vand is employed to charge a batteryV 154 held in iixedposition by means of a substantially rectangular receptacle V155 alsosecured to the top wall 38.

-Reference numeral 156 designates a split collar'surrounding the sleeveYV1179 andxedly secured thereto as by of a'pivot pin loll.

The chain V142 is trained t l in a tongue 164 pivotally connected by pin166 to a clevis 168 proliecting from one end of a second hydrauliccylinder 179. The hydraulic cylinder 171i includes an extendable andretractable piston rod 172 pivotally connected at its outer end by pivotpin 174 to a clevis 176 projecting from one end of a second boom 173.The other end of the boom 178 is also provided with a clevis 189 whichreceives therein a tongue 132 that is pivotally connected thereto on apivot pin 124. The tongue 132 is integral with or rigidly atlixed to oneend of a third boom 186 which normally depends from the boom 17S. inFlGURE l, the clevis 1S@ is upwardly and arcuatelycurved as is indicatedat 13S. One end of an elongated,

substantially hollow tubular connector lever 190 is piv-V otallyconnected at 192 to the clevis 13b adjacent to but spaced from the outerend thereof. The other end of the lever terminates in an upwardly andarcuately-shaped clevis ld that receives the boom lo?. therein adjacentthe outer end thereof. As is seen in FIGURES l and 2, the boom 162 isconnected to the clevis 194 by means of a pivot pin 196 spaced inwardlyon the boom 162 from the pivot pin 166. At will also be noted that theApivot pin 19o is spaced inwardly from the outer terminal ends of theclevis 194.

The other terminal end of the clevis 194 carries a pivot pin 19 on whichis pivotally secured the outer end of a piston rod 2G@ of a conventionalhydraulic cylinder 202. The piston rod projects from one end of thehydraulic cylinder 2192 and is extendable and contractable relativethereto. The other end of the hydraulic cylinder 202 terminates in atongue 264 connected on pivot pin 266 which is supported at the apex ofa pair of laterally-spaced and substantially parallel inverted V-shapedbrackets 298. As is seen in FIGURE l, the lower ends of arms 219, 212 ofthe brackets 268'are lixedly secured to the boom 162 adjacent to butspaced outwardly from the pivot pin 16).

Reference numeral 214 denotes a second Asplit roller having confrontingtabs or ears 216 between which extends a pivot pin 218 on which ispivotally supported a tongue 229 connected to the inner end of ahydraulic cylinder 222. A piston rod 224 is reciprocable relative tothe'hydraulic cylinder 222 at the other end thereof and is pivotallyconnected on pivotrpin 226 supported at its ends in brackets 228 lixedlysecured in laterally-spaced relation and upstanding from the boom 162. l

TheV projecting end of the platform 122 is preferably supported by apair of brace members 236 having their respective upper ends ylixedlysecured thereto, and their v lower ends connected with the collar 214 inany desirable Interposed between' the platformV 122 and the Y manner.end closure wall 104 is a washer 232,'and tie platform 122 is pivotallyconnected on the end closure wall'1tl4 by v means of the pivot bolt 234and Vthe lock nut 236.

Fixedly connected to the outerrend of the boom 156 is 'an elongatedinverted, VsubstantiallyU-shaizaed holder 23S preferably'formed of ametallic material. Thejholder 233` is provided with a liner 24% of nonconductivema Y holder 238 and the bight'portion 246 ofthe liner'fortransverse configuration (see FIGURE 9) with the con-V cave sideVthereof facing downwardly andlop'eiiing into a ,plane substantiallyparallel, butAvertic'ally-spaced from" the plane of the opening into theliolder'23l. The upper Y lend oftherthroat 25e is lixedly Connected tolonelend of Vanelongated substantially hollow, tubularffleiiibl'e Vcon-YVduit 269which is supported from the boon'1' 1162, the con- -V As isseen.

nected lever 196 and the boom 58 by means of a plurality of hangerbrackets 262.

Projecting vertically and upwardly away from the platform 122 is anelongated, substantially hollow tubular standard 266 (see FIGURES l and3), the lower end of the standard 266 being secured to the platform 122by any conventional means.

The standard 266 is laterally-spaced from the seat 124 and has securedto the upper end thereof a valve manual 263. The manual 268 is ofconventional design and includes a plurality of manually-operablevalve-actuating levers 27d. Also mounted on the manual 268 is amanually-operated electrical switch 272. The switch 272 is connectedthrough wires 274 and 276 with the electromagnets 242, and pairs offlexible conduits 27S, 276, 2S@ and 2S?. connect the hydraulic cylinders202, 222, 176 and 431( with the manual 26S, the valve-actuating leversor handles 27@ controlling the flow of fluid through these lines,whereby their respective associated piston rods are extended orretracted. The manual 263 is also connected with a pair of exible cables284 at one of their respective ends, the other ends of the dexiblecables or conduits 234 are connected with a hydraulic cylinder 286having a piston rod 28S. One end of the hydraulic cylinder 285 ispivotally connected at 290 to the boom 178 adjacent to, but spaced fromthe pivot pin 184, and the outer end of the piston rod 238 is pivotallyconnected at 292 to a lug 2% carried on the boom 186.

Reference numeral 2&6 designates an elongated, substantially rectangularhousing from which project a pair of foot-operated levers 2% andconstitute hydraulic fluidcontrol levers for controlling the fluidsupply to the manual 268.

rl`he uid circuits and the valving therefor have not been set forth inthe drawings since the circuit and valves are old and well-known in theart. Sui-lice it to state that as a selected one of the valve handles orlevers 27) is pulled toward the operator, fluid will pass from themanual to one side of the piston rod, while at the same time, iluid onthe opposite side of the piston rod is being returned to the manualthrough the other conduit of the last-mentioned pair. Fluid dow throughthe selected pair of conduits may be reversed by pushing the selectedone of the valve-actuating levers in a direction away from the operator,and ow of duid in either direction is halted by moving the selected oneof the handles 279 to a neutral or central position.

Reference numeral 3% designates an air-exhaust pipe having amanuahy-controlled buttery valve 3432 installed therein. As is seen inthe drawings, the air-exhaust conduit 39%) projects through the sidewail 32 and is in open communication with the exhaust side of die pump74. Reference numeral 3M denotes a 1re-circulation pipe ha ing amanually-operable butterfly valve 396 mounted therein. As is seen inFIGURES 2 and 4, one end of the re-circulation pipe Sr! is connected tothe inlet pipe 3h0, while the other end of the re-circulation pipe 3d@extends through the side wall 32 and depends into the collector bin 28.

Having described and illustrated this invention in detail, it isbelieved that the operation of the machine or device is self-evident.However, a brief summation thereof is set forth below.

The truck l@ is operated in the usual manner, and if the de ice is to beoperated during truck travel, an operator will occupy the seat 124facing the manual 268. The switch 272 is turned to its on position and,assuming, that it is desired to lower the electromagnets and the nozzletoward the ground or pavement, the operator will select one of the valvehandles 270 which controls the flow of hydraulic fluid for the cylinder222. The piston rod 224 is now extended, causing the boom 162 to pivotdownwardly from the full-line position shown in FIG- URE 1, to, forexample, the full-line position shown in FlGURE 5. Upon completion ofthis movement, the

CII

operator may then effect actuation of the hydraulic cylinder 262 throughthe operation of one of the control handles 279 to cause the piston rod206 to move outwardly, whereby the connector link 192 is caused to pivotabout the pin 96 in a counterclockwise direction until it is moved fromthe full-line position shown in FIGURE l to, for example, the full-lineposition illustrated in FIG- URE 5. Thereafter, the hydraulic cylinder17% may be actuated to cause its piston rod 172 to move in a directionaway therefrom, and is so moving, the boom 178 pivots around the pivotpin 192 until the boom 17S is turned to the full-line position shown inFIGURE 5. It may Well be that the angularity between the axes of thebooms 17S and 36 will require adjustment, and if the angle thereofrequires correction, the hydraulic cylinder- 286 is activated to extendor retract its associated piston rod 28S until the axis of the boom 86is substantially perpendicular with respect to the surface beingcleaned. The drag chains 254 serve merely as a measuring device toadvise the operator that the magnetic holder 238 is a given distancefrom the ground or pavement.

FGURE 5 illustrates the machine or device in full lines in one of itsmany adjusted positions. The device could be operated, for example, toextend the electromagnetic holder 238 and the connected nozzle 258 agreater distance, asshown in dotted lines to the left of the full-lineposition shown in FlGURE 5. Other positions can be achieved from theselective operation of the valve controlling levers 27).

It will be understood, of course, that as the electromagnets 242 sweepthe road, pavement, or other type of ground surface, the nozzle 258, dueto the vacuum exerted thereon, picks up paper, debris of any light sort,for disposition in the collector bin 23, and that the tin cans and othertype of sewage material collected by the electromagnets will bedeposited upon the bed 2i) through the proper operation of the valvecontrolling handles 270 causing the boom 186 to be extended across thebed. The position of the boom 86 preparatory to the release of themagnetically-atnacted material is shown in FIGURE 5 to the right of thefull-line illustration thereof shown in FGURE 5. As soon as theelectroraagnets 242 are positi :red over the bed, the operator turns theswitch 272 to its olf position and the metal attracted to the magnets242 will descend, under the force of gravity, to the bed 2d. l

The sweep of the several booms described herein is substantially in anarc of ldd degrees in order to afford the device the maximum amount offlexibility. This is accomplished, of course, through the activation ofthe hydraulic cylinder 13e which effects rotation of the chain ldd tocause the sprocket wheel l5?. to turn elli degrees to either side of thefull-line position shown in FIGURE 2.

lil-URE l0 illustrates a modification of the invention wherein it isseen that a plurality of drag rods dill) are substituted for the dragchains 25d, 256, the drag rods ed@ being looped Vat de?. through eyes $4which have terminal ends 165 which abut against the core in which theelectromagnets 243 are embedded. The rods serve the same purposes as thechains 25d. l-iaving described and illustrated two embodiments of thisinvention in detail, it will be understood that the same are offeredmerely by way of example, and that this invention is to be limited onlyby the scope of the appended claims.

What is claimed is:

l. An electromagnetic and vacuum debris collector comorising anautomotive vehicle having a bed supported thereon, a closed debriscollector` bin mounted `thereon adjacent one end thereof, a vacuum pumpin said bin exhausting to the atmosphere through a first wall of saidbin, a substantially rigid conduit extending through a second Wall ofsaid bin on opposite sides thereof with one end of said rigid conduitopening into said bin, an

7 upright substantially hollow cylindrical member having an upper closedend, means rigidly connecting the lower end of said upright member to athird Wall of said bin, an elongated uprightV sleeve encompassing saidcylindrical member in spaced concentric relation relative thereto andbeing rotatable about the vertical axis of said cylindrical member, anoperator platform extending across the upper end of said sleeve andprojecting therebeyond, an upright standard supported on said platformand having the lower end thereof ixedly secured to said platform, acontrol manual ixedly secured to the upper end of said standard, a pairof split collars rigidly secured to said sleeve in vertically-spacedrelation, each of said collars having theirtfree ends disposed inconfronting relation, a pivot pin extending between and supported oneach pair of said confronting free ends, a first boom having one of itsends connected on the pivot pin of the lowermost one of said collars,said first boom being pivotal in a substantially vertical directionabout said pivot pin, a connector lever pivotally connected adjacent oneof its ends to the other end of Vsaid rst boom, a second boom, meanspivotally connecting the other end of said connector link to said secondboorn adjacent one end thereof, a tln'rd boom, means pivotallyconnecting the other end of said second boom to one end of said thirdboom, an elongated housing tixedly secured and depending from the otherend of said third boom, a plurality of electromagnets Xedly securedwithin said housing, a downwardly-opening nozzle, means fixedlyconnecting said nozzle to said housing, an elongated exible hollowconduit having one of its ends connected with said nozzle and its otherend connected to the other end of said rigid conduit,

gization and de-energization of said electromagnets, a

`first hydraulic cylinder pivotally connected to the pivot pin of theother of said collars and pivotally connected to said first boomintermediate the ends thereof, bracket means on said first boom, asecond hydraulic cylinder pivotally connected to said bracket means andto said one end of said connector link, a third hydraulic cylinderpivotally connected to said other end of said first boom and to said oneend Yof said second boom, a fourth hydraulic cylinder pivotallyconnected to said second and third booms intermediate the ends thereof,and hydraulic fluid conduit means connecting each of said Yhydrauliccylinders with said control manual for selective operation thereof or incombination with one another. t

2. An electromagnetic and vacuum debris collector as defined in claim l,and a sprocketV iixedly secured to said sleeve, andhydraulically-operable means connected to said sprocket to effectrotation of said sleeve about said vertical axis.

References Cited in the file of this patent UNTED STATES PATENTS FranceJan. 16, 1961

1. AN ELECTROMAGNETIC AND VACUUM DEBRIS COLLECTOR COMPRISING ANAUTOMOTIVE VEHICLE HAVING A BED SUPPORTED THEREON, A CLOSED DEBRISCOLLECTOR BIN MOUNTED THEREON ADJACENT ONE END THEREOF, A VACUUM PUMP INSAID BIN EXHAUSTING TO THE ATMOSPHERE THROUGH A FIRST WALL OF SAID BIN,A SUBSTANTIALLY RIGID CONDUIT EXTENDING THROUGH A SECOND WALL OF SAIDBIN ON OPPOSITE SIDES THEREOF WITH ONE END OF SAID RIGID CONDUIT OPENINGINTO SAID BIN, AN UPRIGHT SUBSTANTIALLY HOLLOW CYLINDRICAL MEMBER HAVINGAN UPPER CLOSED END, MEANS RIGIDLY CONNECTING THE LOWER END OF SAIDUPRIGHT MEMBER TO A THIRD WALL OF SAID BIN, AN ELONGATED UPRIGHT SLEEVEENCOMPASSING SAID CYLINDRICAL MEMBER IN SPACED CONCENTRIC RELATIONRELATIVE THERETO AND BEING ROTATABLE ABOUT THE VERTICAL AXIS OF SAIDCYLINDRICAL MEMBER, AN OPERATOR PLATFORM EXTENDING ACROSS THE UPPER ENDOF SAID SLEEVE AND PROJECTING THEREBEYOND, AN UPRIGHT STANDARD SUPPORTEDON SAID PLATFORM AND HAVING THE LOWER END THEREOF FIXEDLY SECURED TOSAID PLATFORM, A CONTROL MANUAL FIXEDLY SECURED TO THE UPPER END OF SAIDSTANDARD, A PAIR OF SPLIT COLLARS RIGIDLY SECURED TO SAID SLEEVE INVERTICALLY-SPACED RELATION, EACH OF SAID COLLARS HAVING THEIR FREE ENDSDISPOSED IN CONFRONTING RELATION, A PIVOT PIN EXTENDING BETWEEN ANDSUPPORTED ON EACH PAIR OF SAID CONFRONTING FREE ENDS, A FIRST BOOMHAVING ONE OF ITS ENDS CONNECTED ON THE PIVOT PIN OF THE LOWERMOST ONEOF SAID COLLAR, SAID FIRST BOOM BEING PIVOTAL IN A SUBSTANTIALLYVERTICAL DIRECTION ABOUT SAID PIVOT PIN, A CONNECTOR LEVER PIVOTALLYCONNECTED ADJACENT ONE OF ITS ENDS TO THE OTHER END OF SAID FIRST BOOM,A SECOND BOOM, MEANS PIVOTALLY CONNECTING THE OTHER END OF SAIDCONNECTOR LINK TO SAID SECOND BOOM ADJACENT ONE END THEREOF, A THIRDBOOM, MEANS PIVOTALLY CONNECTING THE OTHER END OF SAID SECOND BOOM TOONE END OF SAID THIRD BOOM, AN ELONGATED HOUSING FIXEDLY SECURED ANDDEPENDING FROM THE OTHER END OF SAID THIRD BOOM, A PLURALITY OFELECTROMAGNETS FIXEDLY SECURED WITHIN SAID HOUSING, A DOWNWARDLY-OPENINGNOZZLE, MEANS FIXEDLY CONNECTING SAID NOZZLE TO SAID HOUSING, ANELONGATED FLEXIBLE HOLLOW CONDUIT HAVING ONE OF ITS ENDS CONNECTED WITHSAID NOZZLE AND ITS OTHER END CONNECTED TO THE OTHER END OF SAID RIGIDCONDUIT, SWITCH MEANS ON SAID MANUAL TO SELECTIVELY EFFECT ENERGIZATIONAND DE-ENERGIZATION OF SAID ELECTROMAGNETS, A FIRST HYDRAULIC CYLINDERPIVOTALLY CONNECTED TO THE PIVOT PIN OF THE OTHER OF SAID COLLARS ANDPIVOTALLY CONNECTED TO SAID FIRST BOOM INTERMEDIATE THE ENDS THEREOF,BRACKET MEANS ON SAID FIRST BOOM, A SECOND HYDRAULIC CYLINDER PIVOTALLYCONNECTED TO SAID BRACKET MEANS AND TO SAID ONE END OF SAID CONNECTORLINK, A THIRD HYDRAULIC CYLINDER PIVOTALLY CONNECTED TO SAID OTHER ENDOF SAID FIRST BOOM AND TO SAID ONE END OF SAID SECOND BOOM, A FOURTHHYDRAULIC CYLINDER PIVOTALLY CONNECTED TO SAID SECOND AND THIRD BOOMSINTERMEDIATE THE ENDS THEREOF, AND HYDRAULIC FLUID CONDUIT MEANSCONNECTING EACH OF SAID HYDRAULIC CYLINDERS WITH SAID CONTROL MANUAL FORSELECTIVE OPERATION THEREOF OR IN COMBINATION WITH ONE ANOTHER.